Scavenging-pump construction.



w. SGHENKBR. l SOAVENGIBIG PUMP GONS'IBUQTION.

APPLIGATIOH FILED PEB. 8,1912.

mamans... 31, 1912.

2 BHEET-BEEET 1.

W. SCHENKER.

SGAVBNGING PUMP CONSTRUCTION.

APPLICATION FILED PEB-8,1912.

Patented Deo.31, 1912.

2 BHEIZTS-SHBET 2.

@WWI/woz .ai uc WALTER SCHENKER, OF XVINTERTHUR, SNITZERLANLD, ASSIGNOR TO B`USCH-SULZER IBRGS.'.DIESEL ENGINE COMPANY, OI" ST. LOUIS, MISSOURI, A CRIORATIOiI tJF MISSURI.

SCi-KVENG'NGAUMP CONSTRUCTION.

Application filed y'alfemuriry 8, 1912.

To all whom it may (fono/1m Be it known t'lmt' il., `'Ai/ri-:n Soni-:muuu n citizen of the vilepuhlir` ot Hu'itzerlnntfl, re siding it iVintertluu, 'Sn'itxerlnnrh have invented the following teserihed new und u, e ful ltmprovennntl in Sf'aiveitiring-Pump (lon- Struet i on.

The invention :in improved und niinplitied mennol otA vulve operntion in the senvenging pumps o'tf eomhustion engines., or ot" other puinpiiu;l nppnrutim, und consists in the relative arrangement und disposition ot. the several -purts no hereiun'tter tloueritml und ns exemplilied in the drn\.vin;.\, vrimrehy greater eompnrtnes :ind durnhility, us: well un improved nppenrnnee, :ire ol tuined.

in the drawings, VFigure I rem-enents in Side elevation n threeeylinder twovo'vele combustion engine provided with n -;i\'oii;;' ing pump equipped with thi,` invention. Fie'. i). is :in end elevntion ot' surh pump, 'with parts broken out lto show tho interior arrangement; und Fig. f3 is n Ldiction, ouh# st'nntinlly on the line ll i'm-l'tl otl Fig. L, in-

dicnting the nature of the lenti-tight elohure, through. which motion in impurted to the vulve mechanism o l the pump.

The three oomhust ion Cylinders, nuirliod 1, are mounted on the oonunon l'ieilplaite, 2, in line with euch other und with their senvenging; pump 3, whioh mounted nt' one end ot the Sinne hed-ph1te und driren hy o, suitnhle crunk oonneetion with the engine erunli` Sluilt 4, which lutter shnl't thus 'toi-mh4 the pumping,lr shut't. of the pump. The Iwvernl combustion (,[vlinderxs` nre herein nhtnvn without :my oit the, usunl engine zitzeeouories, it being understood thnt. they muy he eonstrueted :recording to any suituhlo priiufple` of operation, Yfor instaure. they muy he two cycle engines ot the Dieoel type. The senrenging pump muy also he huilt; :recording to any suitable design :1nd muy consistY of one 0r .weve-nl oylinderu nrrfing'ed to eonipress scavenging nir or other tluid in one, or morev 'Stages as desired. As herein indifnted und preferred :For enginesK ot' the type referred to, the large pumping evlinder 3 is niountod on top of u smaller ovlindor Il, whieh lutter .may form the pumping; mechanism t'or eompressing' the nir tor tuel injection purposes. The piungersof hoth Cylinders nre intended to be opernted by u single eonneeting' rod sind suitable crunk eonneetitjins, not, indi- Speciticntion oi Letters n tout.

l )ntiniod Drent it it! t t5.

Serial No. 676,451.

exited, with the engine uhutft. The seui'enger pump tzvlindor il, is preternhly dol1hle:u:t ing` with ports :ind t3 on hoth .sidesv ol,I its inunpinf plunger T, eonnnunieuting; with n .'uli'e eheht tl, whieh lorins n purl oE the vulve meelninirun ot' thut pump. Hut-h irttvo meehnnism intilude.-, nlm n hollow pinton or Aslide-vnlve l), whieh eolnpriseff` suituhle vulve element 4 for eneh ot the ports :7, ti, nfs will he ohuerved in the drnwing's. The spuee ttt` outuido oi the vulve :intl within the vulve litt torniol one ol.I the vulve elunnhers :ulnpted to he put",v in ulternnte eominuniem tion with the porto4 5 und t2, in the usnul munner, while the spzu'e 11, :it the onde ot the vulve ehefst und within the vulve El, torniy the other vulve ehnmher udnpteti l'or similnr niternule, r'oi'uinuniention with the porto,V :neordiun' to tho motion innpnrted to the vulve. (hie ot these ehumherl t'ornrl the inlet und the .other the outlet conduitA `t'or tho pump und it is innnnterinl to the ln'ondest` :wpeet ol this invention whieh ot` these tchuulheru serres whit-h purpose'7 exrept thnt in the t`v|u3oft`nf1iue illustvaxted the greatest; rfonvenieneo und eoinpnetixeany is ohtnined h v :uniting the rluunher l'l the iniet` :ind tho ohumher lt) the outlet, und :ii-running the vnlvehetunting' insuring' to :iet :n'etn'lizi;,zl\'. lhe torre-puu- I2v therefore lends4 lnterullv 'roin the elunnher it), to the reservoir pipe t3, whit-h. :asl usunl. eonstitutes' the dii-ort. supply otl siulvengfiiiig' :tir for eueh ot' the oouihustion o vlindors. und the intnle pipo ift7 tendo to the other elmmher, hein;1 eonneeted h v n suitnhle joint to tht` liottoui ot" the vulve eli-eat :intl extended downwnrdlv theretroin toward the engine erunlosimtl't und :dough-ide tli(-'en.-:iii;r -or stnndnrd ill. whieh Supports the pumping ovlinder or ovlinders. The smid pipe, or eonduit Il, pret'ernhlv extends through or punt` the hedplnto where itv reeeivesl 'from lit-low itu ,wup-- plv ol nir. It is deoirnlily stepped on the uuu-fins ot' un n|`u3rture 'l-I in the hedlplnt'o und heingg' on one side of the ernnlf-nhni't itY 100 thus-I torn` :in etl'eetive strut lqupport .l'or the vertienl pump, whieli i9 pnrtlieulnrly rituel-- ivel in re'istinn the ulrnin; :ind vihrution therein. The unid pipe is; of uutiieient' interunl diuvnet'er to neeonuuodnte tho volume otE fluid designed to puur-t throu h it. :ind :tino the truin ot operating;Y elements. lav whieh :ipproprinte motion is inlpnrt'ed to the vulve.

mechanism; from the crank-shaft. Such train includes a connecting valve rod l5, and a rock lever 16, which is connected to the crank-shaft by 'means of an eccentric, as shovvn, or in any suitable manner adapted to impart oscillatory movement to the lever. The valve rod is contained Wholly within the pipe or conduit 1-1, being pivotally connected to the end of the rock lever therein and direct connected to the pump valve, that is without the intervention of stuing box connections, so that it will thus vvork in and through the junction of the conduit and the valve chest. Various different types of pump valves may bc"e1nployed in place of the particular type illustrated in the drawings, and in such case the connection with the valve rod may be varied accordingly, but the location of the rod Within the conduit and within the junction of the conduit and valve chest avoids the necessity for the usual stuiiing box in the. latter, aswell as certain other jointed connections which will be recognized by those familiar with this subject.

The rock lever 1G extends through the side of the conduit 14, to the interior of the casing or standard 21. Without disturbying the isolation of the interior .from the exterior of the conduit, and for this purpose is journaled or fulcrumed in a part Which forms the wall of the conduit inthe region adjacent to the lever, The conduit is' pref-A erably extended laterally toward the pump casing, as shown at 17, in order to meet a corresponding projecting seat formed on the pump casing, and the journal for lthe rock lever is disposed in the latter part. Such journal is formed by a pair of opposed bearing surfaces 19, each having a circular section concentric to the axis of the lever, and the latter is formed with opposite Winglike enlargements Q0, with correspondingly curved faces engaging on the faces 19, so as to form a ball-and-socket type of journal for the lever, but as the bearing faces are preferably cylindrical, the oscillation of the lever is thereby maintained in a fixed plane. The said lever may be .maintained on its bearing thus formed by the curvature of the bearings themselves, but a cross-shaft 22, is

-desirably added, such shaft .being of course concentric to the' opposite bearing faces and preferably held in sleeves 23, which give it the capacity of some lateral adjustment so that it may be set up as occasion demands to takeup Wear of the faces 19 and 20. The ends of the lateral projections 20, being least subject to Wear` are found to maintain a-substantially leak-tight join'twith. the.

ends of the bearings without providinggaskets or filling therefor although such addition can be madev if found necessary. lt will be observed that the tight fulcrum joint of the' rock lever is so locatedthat it is saine system that lubricates the crank shaft.. From the foregoing it will be seen that,

the valve operating mechanism is entirely concealed from view and is extremely siinlple in construction and mode of operation, but that the interior joint of the valve rod and the fulcrum joint are both accessible for attent-ion When needed, the former through the manhole Q11, and 'the latter through the inside of the pump casing or standard 21, which mayl be inclosed with suitable cover plates, if desired.

Claims:

1. ln an internal combustion engine, the combination with the scavenger or`air service pump thereof comprising the engine shaft, a cylinder7 a plunger therein, and a suitable valve, ot' an air conduit communi-- eating with said vrlveand extending toward the crank shaft, a rock lever actuated by the crank shaft and extending through the side of said conduit and having a leaktight fulcrum joint exposed to conditions in the region of the crank shaft, and a rod housed in the conduit and connecting the portion of said rock lever inside the conduit with the pump valve.

2. ln an internal combustion engine, the combination with the engine crank shaft and an air pump driven thereby and having a suitable valve, of an air conduit communicating with said valve and extending alongside the pump toward the crank shaft, and means for actuating said valve from 'the crank shaft comprising a rock lever extending transversely from the region of the crank shaft through 'the side of said conduit, and an oscillating connecting rod housed in said conduit, being connected at one end to the end of said lever inside the conduit and at the other end directconnected to said valve.

3. In an internal combustion engine, the combination with the `engine crankshaft and an air pump driven thereby and having a suitable valve, of an air conduit communicating with said valve and extending alongside Athe pump toward the crank shaft, a rock lever actuated by the crank shaft and extending` transversely from the regione.. thereof through the side of said conduit, an

oscillating connecting rod housed in said conduit, being connected at one end to the llt) end of said lever inside thecondiiit and at shaft, a cylinder, a plunger' therein, a suit-- able valve and crank case,of an air conduit communicating with said valve and eX- tending alongside of the crank case, and a train for ope ating said valve from the engine shaft housed entirely in the crank ease and in said conduit..

5. In an internal combustion engine, the combination with the engine shaft, an air pump comprising a cylinder having a suitable valve and a plunger inside the cylinder operated by the engine shaft, a easing between the pump cylinder and the engine shaft', and an air conduit connminieating withv `said valve and extending alongside said easing, of a rock lever actuated by the engine shaft and extending through said casing and the' side of said conduit., and an oscillating connecting rod connected at its lower end to said lever within the conduit and at its Lipper end direct connected to said valve.

6. In an internal combustion engine, the combination with a vertical scavenger or air service pump comprising the engine crank shaft, a cylinder, a plunger therein, a suitable valve, and a crank case', of an intake air conduit communi `ating with said valve and extendingdownward below the engine bed, a lateral recess between-said conduit and crank ease, a rock lever actuated by the engine shaft extending from the interior of the crank ease through said recess into the conduit and having means at its fulcrum closing said recess, and a rod housed in' the conduit and connecting said lever with the valve.

' 7. In an internal combustion engine7 the combination with a vertical scavenger or air service punip comprising the engine crank shaft, a cylinder, a plunger therein, a suitable valve, and a crank case, of an intake air conduit coninnuiicating with said valve and extending downward to and through the engine bed and a train for operating said valve from the crank sli-att housed within the crank case and conduit.

In testimony whereo't, I have signed this specification in the presence oi two witnesses.

W'ALTER SCHENKER. Witnesses Hanny A. MCBRIDE, CARL GUnLi-nz. 

